Cal. Pen. Code § 29813
The Department of Justice shall provide local law enforcement agencies and the district attorney access through an electronic portal to information regarding individuals residing in their jurisdiction listed in the Armed Prohibited Persons System who have not provided proof of relinquishment of firearms registered in their name. Each local law enforcement agency shall designate a person to access or receive the information and shall report to the Department of Justice quarterly regarding steps taken to verify that the individuals are no longer in possession of firearms. Law enforcement agencies operating in the same jurisdiction may agree to designate one lead agency for their jurisdiction to report on the steps taken to verify individuals are no longer in possession of firearms.
Ca. Pen. Code § 29813